<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 08:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.01.29 (029) 08:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202602901290840009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.211" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.466" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.750" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="327.328" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.650" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.035" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="228.897" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.892" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="100.505" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="9.076" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.484" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="78.250" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="6.140" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="72">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
225.000 220.000 221.667 223.333 225.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 230.000 233.333 236.667 240.000 240.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 246.667 248.333 250.000 255.000 255.000 256.765 258.529 260.294 262.059 263.824 265.588 267.353 269.118 270.882 272.647 274.412 276.176 277.941 279.706 281.471 283.235 285.000 285.000 287.414 290.069 293.005 296.269 299.917 304.024 308.680 314.004 320.151 327.328 335.817 346.013 358.491 374.112 394.235 421.133 458.921 515.890 611.613
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
72 72 0 0 72 57 0 69 0 0 0 0 0 0 0 72 72 0 57 66 66 0 75 75 0 75 69 72 54 78 0 0 72 57 60 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 51 60 0 0 0 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 -2.734375 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 2.734375 -0.390625 -0.390625 -1.953125 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 0.390625 -2.734375 1.171875 -2.734375 -0.390625 -1.171875 -0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="181">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.919 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.667 140.0 145.0 150.0 155.0 160.0 161.333 165.0 170.0 175.0 180.0 185.0 187.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.035 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.431 0.563 0.629 0.65 0.641 0.612 0.56 0.479 0.346 0.32 0.32 0.32 0.32 0.32 0.32 0.32 0.367 0.431 0.496 0.56 0.624 0.65 0.707 0.837 1.042 1.378 1.906 2.603 3.256 3.759 4.142 4.446 4.692 4.897 5.069 5.214 5.336 5.44 5.526 5.596 5.653 5.696 5.726 5.744 5.75 5.75 5.745 5.732 5.71 5.68 5.644 5.6 5.55 5.495 5.435 5.37 5.3 5.228 5.151 5.072 4.991 4.907 4.822 4.735 4.647 4.559 4.469 4.379 4.289 4.199 4.109 4.02 3.931 3.842 3.754 3.668 3.582 3.497 3.413 3.331 3.249 3.169 3.091 3.013 2.937 2.863 2.79 2.718 2.648 2.579 2.512 2.446 2.382 2.319 2.257 2.197 2.138 2.081 2.025 1.97 1.917 1.865 1.814 1.765 1.717 1.67 1.624 1.579 1.536 1.494 1.453 1.412 1.373 1.335 1.298 1.262 1.227 1.193 1.16 1.128 1.096 1.066 1.036 1.007 0.979 0.951 0.925 0.899 0.874 0.849 0.825 0.802 0.78 0.758 0.736 0.716 0.696 0.676 0.657 0.639 0.621 0.603 0.586 0.57 0.554 0.538 0.523 0.508 0.494 0.48 0.466 0.453 0.44 0.428 0.416 0.404 0.393 0.382 0.371 0.36 0.35 0.34 0.331 0.321 0.312 0.303 0.295 0.287 0.278 0.271 0.263 0.256 0.248 0.241 0.234 0.228 0.221 0.215 0.209 0.203

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.65" PeakHeight="110.0" Num="3" Error="0.0">
-24.198 5.787 -0.67
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.65" EndFrequency="5.75" PeakHeight="300.035" Num="5" zHalfNm="228.897" Error="4.302">
-147.95 53.765 -22.122 4.473 -1.201
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.0" Depth="0.33"/>
<TopsideChapman PeakHeight="300.035" PeakDensity="410204.72" PeakScaleHeight="54.484" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
